Open cluster
NGC 663 (NGC663)
In Cassiopeia (Cas) • Magnitude 7.1 • 6.0 arcminutes
Open the free AstroPlanner with NGC 663 pre-selected, scored against your telescope, location, and the live cloud forecast.
Rich open cluster in Cassiopeia.
NGC 663 at a glance
| Catalog IDs | N 663 |
| Type | Open cluster |
| Constellation | Cassiopeia (Cas) |
| Right ascension | 01h 46m 16s |
| Declination | +61° 13' 06" |
| Apparent magnitude | 7.10 |
| Angular size | 6.0 × 6.0 arcmin |
| Max altitude at 45°N | 74° |
| Best imaging months | Oct, Nov, Dec, Jan |
How to image NGC 663
NGC 663 sits in the constellation Cassiopeia at right ascension 01h 46m 16s and declination +61° 13' 06". To frame and integrate it well, AstroPlanner will compute the optimal moonless window for tonight from your location, the field-of-view fit against your sensor and focal length, the suggested total integration time given your aperture and sky Bortle class, and a cloud-aware schedule that drops it from the plan if your nearest cloud forecast spike overlaps the best altitude window.